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? 2007 - 2016 microchip technology inc. ds000002250a-page 1 highlights ? integrated usb 2.0 compatible 4-port hub - 4 transaction translators for highest perfor- mance - high-speed (480mbits/s), full-speed (12mbits/s) and low-speed (1.5mbits/s) compatible - full power management with per port or ganged, selectable power control - detects bus-power/self-power source and changes mode automatically ? complete usb specification 2.0 compatibility - includes usb 2.0 transceivers ? vid/pid/did, and port configuration for hub via: - single serial i 2 c eeprom - smbus slave port ? default vid/pid/did, allows functionality when configuration eeprom is absent ? hardware strapping options allow for configura- tion without an external eeprom or smbus host ? on-board 24mhz crystal driver circuit or 24 mhz external clock driver ? internal pll for 480mhz usb 2.0 sampling ? internal 1.8v linear voltage regulator ? integrated usb termination and pull-up/pull-down resistors ? internal short circuit protection of usb differential signal pins ? 1.8 volt low power core operation ? 3.3 volt i/o with 5v input tolerance ? 64-pin lqfp rohs compliant package usb2504/usb2504a integrated usb 2.0 compatible 4-port hub
usb2504/usb2504a ds000002250a-page 2 ? 2007 - 2016 microchip technology inc. to our valued customers it is our intention to provide our valued customers with the bes t documentation possible to ensure successful use of your micro chip products. to this end, we will continue to improve our publications to better suit your needs. our publications will be refined and enhanced as new volumes and updates are introduced. if you have any questions or comments regarding this publication, please contact the marketing co mmunications department via e-mail at docerrors@microchip.com . we welcome your feedback. most current data sheet to obtain the most up-to-date version of this data s heet, please register at our worldwide web site at: http://www.microchip.com you can determine the version of a data s heet by examining its literature number found on the bottom outside corner of any page . the last character of the literature number is the versi on number, (e.g., ds30000000a is version a of document ds30000000). errata an errata sheet, describing minor operati onal differences from the data sheet and recommended workarounds, may exist for cur- rent devices. as device/doc umentation issues become known to us, we will publish an errata s heet. the errata will specify the revision of silicon and revision of document to which it applies. to determine if an errata sheet exis ts for a particular device, please check with one of the following: ? microchip?s worldwide web site; http://www.microchip.com ? your local microchip sales office (see last page) when contacting a sales office, please spec ify which device, revision of silicon and data sheet (include -literature number) yo u are using. customer notification system register on our web site at www.microchip.com to receive the most current information on all of our products.
? 2007 - 2016 microchip technology inc. ds000002250a-page 3 usb2504/usb2504a table of contents 1.0 introduction .............................................................................................................. ....................................................................... 4 2.0 pin table 4-port .......................................................................................................... .................................................................... 5 3.0 pin configuration 4-port hub .............................................................................................. ............................................................ 6 4.0 4-port hub block diagram .................................................................................................. ............................................................ 7 5.0 functional block description .............................................................................................. ........................................................... 12 6.0 backward compatibility to the usb20h04 .................................................................................... ................................................ 30 7.0 xnor test ................................................................................................................. ................................................................... 31 8.0 dc parameters ............................................................................................................. ................................................................ 32 9.0 ac specifications ......................................................................................................... ................................................................. 36 10.0 package outline .......................................................................................................... ................................................................ 37 appendix a: data sheet revision history ....................................................................................... .................................................... 38 the microchip web site ........................................................................................................ .............................................................. 39 customer change notification service .......................................................................................... ..................................................... 39 customer support .............................................................................................................. ................................................................. 39 product identification system ................................................................................................. ............................................................ 40
usb2504/usb2504a ds000002250a-page 4 ? 2007 - 2016 microchip technology inc. 1.0 introduction the microchip 4-port hub is fully compliant with the usb 2. 0 specification and will attach to a usb host as a full-speed hub or as a full-/high-speed hub. the 4-port hub supp orts low-speed, full-speed, and high-speed (if operating as a high-speed hub) downstream devices on all of the enabled downstream ports. a dedicated transaction translator (tt) is available for each downstream facing port. this architecture ensures maxi- mum usb throughput for each connected device when operating with mixed-speed peripherals. the hub works with an external usb power distribution switch device to control v bus switching to downstream ports, and to limit current and sense over-current conditions. all required resistors on the usb ports are integrated into t he hub. this includes all series termination resistors on d+ and d? pins and all required pull-down and pull-up resistor s on d+ and d? pins. the over-current sense inputs for the downstream facing ports have internal pull-up resistors. throughout this document the upstream facing port of the hub will be referr ed to as the upstream port, and the down- stream facing ports will be called the downstream ports. 1.1 oem selectable features a default configuration is available in the usb2504/usb 2504a following a reset. this configuration may be sufficient for some applications. strapping option pins make it possibl e to modify a limited sub-set of the configuration options. the usb2504/usb2504a may also be conf igured by an external eeprom or a microcontroller. when using the micro- controller interface, the hu b appears as an smbus slave device. if the hu b is pin-strapped fo r external eeprom con- figuration but no external eeprom is present, then a value of ?0? will be written to all conf iguration data bit fields (the hub will attach to the host with all ?0? values). the 4-port hub supports several oem selectable features: ? operation as a self-powered usb hub or as a bus-powered usb hub. ? operation as a dynamic-powered hub (hub operates as a bus-powered device if a local power source is not available and switches to self-p owered operation when a local power source is available). ? multiple transaction translator (multi-tt) or single-tt support. ? optional oem configuration via i 2 c eeprom or via the industry standard smbus interface from an external smbus host. ? port power switching on an individual or ganged basis. ? port over-current monitoring on an individual or ganged basis. ? led indicator support. ? compound device support (port is permanently ha rdwired to a downstream usb peripheral device). ? hardware strapping options enable configuration of the following features. - non-removable ports - port power polarity (active high or active low logic) - port disable - led support - mtt enable - ganged vs port power switching and over-current sensing
? 2007 - 2016 microchip technology inc. ds000002250a-page 5 usb2504/usb2504a 2.0 pin table 4-port table 2-1: 4-port pin table for 64-lqfp upstream usb 2.0 interface (3 pins) usbdp0 usbdn0 vbus_det 4-port usb 2.0 interface (26 pins) usbdp1 usbdn1 usbdp2 usbdn2 usbdp3 usbdn3 usbdp4 usbdn4 gr1/ non_rem0 gr2/ non_rem1 gr3/ prt_dis0 gr4/ prt_dis1 am1/ gang_en am2/ mtt_en am3 am4/ led_en prtpwr1 prtpwr2 prtpwr3 prtpwr4 ocs1_n ocs2_n ocs3_n ocs4_n prtpwr_pol rbias serial port interface (5 pins) sda/smbdata scl/smbclk/ cfg_sel2 cfg_sel1 cfg_sel0 misc (8 pins) xtal1/clkin xtal2 reset_n self_pwr atest/ reg_en clkin_en test1 test0 power, ground (17 pins) and (5) no connect
usb2504/usb2504a ds000002250a-page 6 ? 2007 - 2016 microchip technology inc. 3.0 pin configuration 4-port hub figure 3-1: 4-port 64-pin lqfp cfg_sel1 reset_n self_pwr vbus_det vss vdd18 vss nc xtal2 test0 nc vdd18 vss gr1/non_rem0 vdd33 am1/gang_en gr2/non_rem1 am2/mtt_en ocs3_n prtpwr2 ocs2_n vdd18 vss clkin_en test1 ocs1_n prtpwr1 usbdp0 vdda33 usbdn0 vss usbdp1 usbdn1 vdda33 usbdp2 usbdn2 usb2504 & usb2504a 49 64 32 17 16 48 33 xtal1/clkin cfg_sel2 vdda18pll vss usbdn3 usbdp3 prtpwr_pol gr3/prt_dis0 am3 prtpwr4 prtpwr3 ocs4_n vdda33pll 1 atest/reg_en rbias vss vdda33 usbdp4 usbdn4 vss gr4/prt_dis1 am4/led_en nc nc cfg_sel0 nc scl/smbclk sda/smbdata
? 2007 - 2016 microchip technology inc. ds000002250a-page 7 usb2504/usb2504a 4.0 4-port hub block diagram figure 4-1: 4-port block diagram table 4-1: 4-port hub pin descriptions name symbol type function upstream usb 2.0 interface usb bus data usbdn0 usbdp0 io-u these pins connect to the upstream usb bus data signals. detect upstream vbus power vbus_det i/o12 detects state of upstream vbus power. the microchip hub monitors vbus_det to determine when to assert the internal d+ pull-up resistor (signaling a connect event). when designing a detachable hub, this pin must be connected to the vbus power pin of the usb port that is upstream of the hub. (use of a weak pull-down resistor is recommended.) for self-powered applications with a permanently attached host, this pin must be pulled-up to either 3.3v or 5.0v (typically vdd33). upstream v bus upstream phy upstream usb data repeater controller sie serial interface pll 24 mhz crystal to eeprom or smbus master routing logic scl sd tt #1 tt #2 tt #3 tt #4 port controller downstream phy #1 port #1 oc sense switch driver led drivers downstream phy #4 port #4 oc sense switch driver led drivers ... downstream usb data oc sense switch/led drivers downstream usb data oc sense switch/led drivers v bus power detect pin strapping options internal defaults select 3.3v 1.8v reg. 1.8v cap
usb2504/usb2504a ds000002250a-page 8 ? 2007 - 2016 microchip technology inc. 4-port usb 2.0 hub interface high-speed usb data usbdn[4:1] usbdp[4:1] io-u these pins connect to the downstream usb peripheral devices attached to the hub?s ports. usb power enable prtpwr[4:1] o12 enables power to usb peripheral devices (downstream). the active signal level of the prtpwr[4:1] pins is determined by the power polarity strapping function of the prtpwr_pol pin. port 4:3 green led & port disable strapping option. gr[4:3]/ prt_dis[1:0] i/o12 green indicator led for ports 4 and 3. will be active low when led support is enabled via eeprom or smbus. if the hub is configured by th e internal default configuration, these pins will be sampled at reset_n negation to determine if ports [4:2] will be permanently disabled. also, the active state of the led?s will be determined as follows: prt_dis[1:0] = ?00?, all ports are enabled, gr4 is active high, gr3 is active high. prt_dis[1:0] = ?01?, port 4 is disabled, gr4 is active high, gr3 is active low. prt_dis[1:0] = ?10?, ports 4 & 3 are disabled, gr4 is active low, gr3 is active high. prt_dis[1:0] = ?11?, ports 4, 3 & 2 are disabled, gr4 is active low, gr3 is active low. port [2:1] green led & port non- removable strapping option. gr[2:1]/ non_rem[1:0] i/o12 green indicator led for ports 2 and 1. will be active low when led support is enabled via eeprom or smbus. if the hub is configured by th e internal default configuration, these pins will be sampled at reset_n negation to determine if ports [3:1] contain permanently attached (non- removable) devices. also, the active state of the led?s will be determined as follows: non_rem[1:0] = ?00?, all ports are removable, gr2 is active high, gr1 is active high. non_rem[1:0] = ?01?, po rt 1 is non-removable, gr2 is active high, gr1 is active low. non_rem[1:0] = ?10?, ports 1 & 2 are non-removable, gr2 is active low, gr1 is active high. non_rem[1:0] = ?11?, ports 1, 2, & 3 are non-removable, gr2 is active low, gr1 is active low. port 4 amber led & led enable strapping option am4/ led_en i/o12 amber indicator led for port 4. will be active low when led support is enabled via eeprom or smbus. if the hub is configured by th e internal default configuration, this pin will be sampled at reset_n negation to determine if led support is enabled or di sabled. also, the active state of the led will be determined as follows: ?0? = led support is disabled, led is inactive ?1? = led support is enabled, led is active low. table 4-1: 4-port hub pin descriptions (continued) name symbol type function
? 2007 - 2016 microchip technology inc. ds000002250a-page 9 usb2504/usb2504a port 3 amber led am3 i/o12 amber indicator led for port 3. signal will be active low. port 2 amber led & mtt disable am2/ mtt_en i/o12 amber indicator led for port 2. will be active low when led support is enabled via eeprom or smbus. if the hub is configured by th e internal default configuration, this pin will be sampled at reset_n negation to determine if mtt support is disabled (stt only). also, the active state of the led will be determined as follows: ?0? = mtt support is disabled, led is active high ?1? = mtt support is enabled, led is active low. port 1 amber led & gang power switching and current sensing strapping option. am1/ gang_en i/o12 amber indicator led for port 1, will be active low when led support is enabled via eeprom or smbus. if the hub is configured by th e internal default configuration, this pin will be sampled at reset_n negation to determine if downstream port power swit ching and current sensing are ganged, or individual port-by-port. also, the active state of the led will be determined as follows: ?0? = port-by-port sensing & switching, led is active high ?1? = ganged sensing & switching, led is active low. port power polarity strapping. prtpwr_pol i/o12 port power polarity strapping determination for the active signal polarity of the [4:1]prtpwr pins. while reset_n is asserted, the logic state of this pin will (though the use of internal comb inatorial logic) determine the active state of the [4:1]prtpwr pins in order to ensure that downstream port power is not inadvertently enabled to inactive ports during a hardware reset. on the rising edge of reset_n (see the applicable reset_n timing table in section 5.6.1 ), the logic value will be latched internally, and will retain the active signal polarity for the prtpwr[4:1] pins. ?1? = prtpwr[4:1]_p/n pins have an active ?high? polarity ?0? = prtpwr[4:1]_p/n pins have an active ?low? polarity over current sense ocs[4:1]_n ipu input from external current moni tor indicating an over-current condition. {note: contains internal pull-up to 3.3v supply} usb transceiver bias rbias i-r a 12.0k ? ( ???????? resistor is attached from ground to this pin to set the transceiver?s internal bias settings. serial port interface serial data/smb data sda/smbdata iosd12 (serial data)/(smb data) signal. serial clock/smb clock scl/smbclk iosd12 (serial clock)/(smb clock) signal. configuration programming select cfg_sel0 iosd12 this multifunction pin is read on the rising edge of reset_n negation and will determine the hub configuration method as described in ta b l e 4 - 2 . configuration programming select cfg_sel1 i this pin is read on the rising edge of reset_n (see the applicable reset_n timing table in section 5.6.1 ) and will determine the hub configuration method as described in ta b l e 4 - 2 . configuration programming select cfg_sel2 i this pin is read on the risi ng edge of reset_n negation and will determine the hub configuration method as described in ta b l e 4 - 2 . table 4-1: 4-port hub pin descriptions (continued) name symbol type function
usb2504/usb2504a ds000002250a-page 10 ? 2007 - 2016 microchip technology inc. table 4-2: smbus or eeprom interface behavior cfg_sel2 cfg_sel1 cfg_sel0 smbus or eeprom interface behavior x 0 0 configured as an smbus slave for external download of user- defined descriptors. smbus slave address is 0101100 x 0 1 configured as an smbus slave for external download of user- defined descriptors. smbus slave address is 0101101 0 1 0 internal default configuration 1 1 0 internal default configuration via strapping options. x 1 1 2-wire (i 2 c) eeproms are supported, table 4-3: miscellaneous pins name symbol type function crystal input/external clock input xtal1/ clkin iclkx 24mhz crystal or external clock input. this pin connects to either one terminal of the crystal or to an external 24mhz clock when a crystal is not used. crystal output xtal2 oclkx 24mhz crystal this is the other terminal of th e crystal, or left unconnected when an external clock source is used to drive xtal1/clkin. it must not be used to drive any external circuitry other than the crystal circuit. clock input enable clkin_en i clock in enable: low = xtal1 and xtal2 pins configured for use with external crystal high = xtal1 pin configured as clkin, and must be driven by an external cmos clock. reset input reset_n is this active low sign al is used by the system to reset the chip. the minimum active low pulse is 1us. self-power / bus-power detect self_pwr i detects availability of local self-power source. low = self/local power source is not available (i.e., hub gets all power from upstream usb vbus). high = self/local power source is available. test pins test[1:0] ipd used fo r testing the chip. user must treat as a no-connect or connect to ground. analog test & internal 1.8v voltage regulator enable atest/ reg_en aio this signal is used for testing the analog section of the chip, and to enable or disable the internal 1.8v regulator. this pin must be connected to vdda33 to enable the internal 1.8v regulator, or to vss to disable the internal regulator. when the internal regulator is enabled, the 1.8v power pins must be left unconnected, except for the required bypass capacitors.when the phy is in test mode, the internal regulator is disabled and the atest pin functions as a test pin. table 4-4: power, ground, and no connect name symbol type function vdd1p8 vdd18 +1.8v core power. if the internal regulator is enabled, then vdd18 pin 54 must have a 4.7 ? f (or greater) 20% (esr <0.1 ??? capacitor to vss vddapll3p3 vdda33pll +3.3v filtered analog power for the internal pll if the internal pll 1.8v regu lator is enabled, then this pin acts as the regulator input
? 2007 - 2016 microchip technology inc. ds000002250a-page 11 usb2504/usb2504a vddapll1p8 vdda18pll +1.8v filtered analog power for internal pll. if the internal regulator is enabled, then this pin must have a 4.7 ? f (or greater) 20% (esr <0.1 ??? capacitor to vss vddio3p3 vdd33 +3.3v i/o power. vdda3p3 vdda33 +3.3v filtered analog power. vss vss ground. table 4-5: buffer type descriptions buffer description i input. ipd input, with a weak internal pull-down. ipu input, with a weak internal pull-up. is input with schmitt trigger. o12 output 12ma. i/o12 input/output, 12ma iosd12 open drain?.12ma sink with schmitt trigger, and must meet i 2 c-bus specification version 2.1 requirements. iclkx xtal clock input oclkx xtal clock output i-r rbias io-u defined in usb specification. note: meets usb 1.1 requirements when operating as a 1.1-compliant device and meets usb 2.0 requirements when operating as a 2.0- compliant device. aio analog input/output. per phy test requirements. table 4-4: power, ground, and no connect (continued) name symbol type function
usb2504/usb2504a ds000002250a-page 12 ? 2007 - 2016 microchip technology inc. 5.0 functional block description 5.1 4-port hub microchip?s usb 2.0 4-port hub is fully specification compli ant to the universal serial bus specification revision 2.0 april 27,2000 (12/7/2000 and 5/ 28/2002 errata). please reference chapter 11 (hub specification) for general details regarding hub operation and functionality. for performance reasons, the 4-port hub provides 1 transaction translator (tt) per port (defined as multi-tt configu- ration), divided into 4 non-periodic buffers per tt. 5.1.1 hub configuration options the microchip hub supports a large number of features (some are mutually exclus ive), and must be configured in order to correctly function when attached to a usb host controller. there are three principal ways to configure the hub: smbus, eeprom, or by internal default settings (with or without pin strapping option over-ri des). in all cases, the configuration method will be determined by the cfg_ sel2, cfg_sel1 and cfg_sel0 pins i mmediately after reset_n negation. 5.1.1.1 vendor id is a 16-bit value that uniquely identifies the vendor of t he user device (assigned by usb-interface forum). this field is set by the oem using either the smbus or eeprom interfac e options. when using the inte rnal default option, micro- chip?s vid (see table 5-1 ) will be reported. 5.1.1.2 product id is a 16-bit value that the vendor can assi gn that uniquely identifies this particul ar product (assigned by oem). this field is set by the oem using either the smbus or eeprom interf ace options. when using the inte rnal default option, micro- chip?s pid designation of (see ta b l e 5 - 1 ) will be reported. 5.1.1.3 device id is a 16-bit device release number in bcd format (assigned by oem). this field is set by the oem using either the smbus or eeprom interface options. when us ing the internal defaul t option, microchip?s did designati on of (see ta b l e 5 - 1 ) will be reported. 5.1.1.4 self-powered/bus-powered the hub is either self-powered (draws less than 2ma of upstream bus power) or bus-powered (limited to a 100ma maximum of upstream power prior to bein g configured by the host controller). when configured as a bus-powered device, the microchi p hub consumes less than 100ma of current prior to being configured. after configuration, the bu s-powered microchip hub (along with all associated hub circuitry, any embedded devices if part of a compound device, and 100ma per exte rnally available downstream port) must consume no more than 500ma of upstream vbus current. the current consum ption is system dependent, and the oem must ensure that the usb 2.0 specifications are not violated. when configured as a self-powered device, <1ma of upstre am vbus current is consumed and all 7 ports are available, with each port being capable of sourcing 500ma of current. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the self_pwr pin determines t he self-powered or bus-powered status. please see the description under dynamic power for the se lf/bus power functionality when dynamic power switching is enabled. 5.1.1.5 port indicators controls the use of led indicator for port status information. see section 11.5.3 of the us b 2.0 specification for addi- tional details. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the led_en pin enables/disables led indicator support. 5.1.1.6 high-speed disable allows an oem to force the hub to configure as a full-speed device only (i.e. high-speed not available). this field is set by the oem using either the smbus or eeprom interface options.
? 2007 - 2016 microchip technology inc. ds000002250a-page 13 usb2504/usb2504a 5.1.1.7 multiple-tt support selects between a mode where only one transaction translator is available for all ports (single-tt), or each port gets a dedicated transaction translator (multi-tt) {note: the host may force single-tt mode only}. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the mtt_en pin enables/disables mtt support. 5.1.1.8 eop disable during fs operation only, this permits the hub to send eo p if no downstream traffic is detected at eof1. see section 11.3.1 of the usb 2.0 specif ication for additional details. this field is set by the oem using eith er the smbus or eeprom interface options. 5.1.1.9 current sensing selects current sensing on a port-by-por t basis, all ports ganged, or none(only for bus-powered hubs)the ability to sup- port current sensing on a port or ganged basis is hardware implementation dependent. this field can be set by the oem using either the smbus or eeprom interface options.when using the internal default option, the self_pwr pin determines if cu rrent sensing will be ganged, or none (ganged if self-power ed, none if bus- powered). 5.1.1.10 downstream port power enabling enables all ports simultaneously (ganged), or port power is indi vidually switched on and off on a port-by-port basis. the ability to support power enabling on a port or g anged basis is hardware implementation dependent. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the gang_en pin will configure the hub for gan ged or individual port-by-port port power switching. 5.1.1.11 compound device allows the oem to indicate that the hub is part of a co mpound (see the usb specification for definition) device. the applicable port(s) must also be defined as having a ?non-removable device?. this field is set by the oem using eith er the smbus or eeprom interface options. note: when configured via strapping options, declaring a po rt as non-removable automatic ally causes the hub controller to report that it is part of a compound device. 5.1.1.12 non-removable device informs the host if one of the active ports has a permanent device that is und etachable from the hub. (note: the device must provide its own descriptor data.) this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the non_rem[1:0] pins will designate the appropriate ports as being non-removable. 5.1.1.13 self-powered port disable during self-powered operation, this selects the ports whic h will be permanently disabled, and are not available to be enabled or enumerated by a host controller. the disabled ports must be contiguous, and must be in decreasing order starting with port 4. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the prt_dis[1:0] pins w ill disable the appropriate ports. 5.1.1.14 bus-power ed port disable during bus-powered operation, this selects the ports whic h will be permanently disabled, and are not available to be enabled or enumerated by a host controller. the disabled ports must be contiguous, and must be in decreasing order starting with port 4. this field is set by the oe m using either th e smbus or eeprom interface options. when using the internal default option, the prt_dis[1:0] pins w ill disable the appropriate ports.
usb2504/usb2504a ds000002250a-page 14 ? 2007 - 2016 microchip technology inc. 5.1.1.15 dynamic power controls the ability of the 4-port hub to automatically change from self-powered operation to bus-powered operation if the local power source is removed or is unavailable (and from bus-powered to self-powered if the local power source is restored). {note: if the local power source is available, the 4-port hub will always s witch to self-powered operation.} when dynamic power switching is enabled , the hub detects the avai lability of a local power source by monitoring the external self_pwr pin. if the hub detects a change in po wer source availability, the hub immediately disconnects and removes power from all downstream devices and disconnects the upstream port. the hub will then re-attach to the upstream port as either a bus-powered hub (if local-power in unavailable) or a self-powered hub (if local power is avail- able). this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.16 over-current timer the time delay (in 2ms increments) for an over-current co ndition to persist before it is reported to the host. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.17 self-powered max power when in self-powered configuration, sets value in 2ma increments. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.18 bus-powered max power when in bus-powered configuration, sets value in 2ma increments. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.19 self-powered hub controller current when in self-powered configuration, maximum current requirements of the hub controller in 2ma increments. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.20 bus-powered hub controller current when in bus-powered configuration, maximum current r equirements of the hub controller in 2ma increments. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.21 power-on timer time (in 2ms intervals) from the time power-on sequence begi ns on a port until power is good on that port. system soft- ware uses this value to determine how long to wait before accessing a powered-on port. this field is set by the oem using either the smbus or eeprom interface options. 5.1.1.22 power switching polarity the selection of active state ?polarity? for the pr tpwr[4:1] pins is made by a strapping option only. 5.1.2 vbus detect according to section 7.2.1 of the usb 2. 0 specification, a downstream port can ne ver provide power to its d+ or d- pull- up resistors unless the upstream port?s vbus is in the asserted (powered) state. the vbus_det pin on the hub mon- itors the state of the upstream vbus signal and will not pull-up the d+ or d- resistor if vbus is not active. if vbus goes from an active to an inactive state (not powered), hub will remove power from the d+ or d- pull-up resistor within 10 seconds. 5.2 eeprom interface the microchip hub can be configured via a 2-wire (i 2 c) eeprom. (please see table 4-1, "4-port hub pin descriptions" for specific details on how to enable the i 2 c eeprom option). the internal state-machine will, (when configured for eeprom support) read the external eeprom for configuration data. the hub will then ?attach? to the upstream usb host. please see ta b l e 5 - 1 user-defined descriptor data for a list of data fields available.
? 2007 - 2016 microchip technology inc. ds000002250a-page 15 usb2504/usb2504a 5.2.1 i 2 c eeprom the i 2 c eeprom interface implem ents a subset of the i 2 c master specification (please refer to the philips semicon- ductor standard i 2 c-bus specification for details on i 2 c bus protocols). the hub?s i 2 c eeprom interface is designed to attach to a single ?dedicated? i 2 c eeprom, and it conforms to the standard-mode i 2 c specification (100kbit/s trans- fer rate and 7-bit addressing) for protocol and electrical compatibility. the hub acts as the master and generates the serial clock scl, controls the bus access (determines which device acts as the transmitter and which device acts as the receiver), and generates the start and stop conditions. 5.2.1.1 implementation characteristics please refer to the microchip 24aa00 datasheet for protocol and programming specifics. 5.2.1.2 pull-up resistor the circuit board designer is required to place external pull-up resistors (10k ? recommended) on the sda/smbdata & scl/smbclk/cfg_selo lines (per sm bus 1.0 specification, and eeprom m anufacturer guidelines) to vcc in order to assure proper operation. 5.2.1.3 i 2 c eeprom slave address slave address is 1010000. 5.2.2 in-circuit eeprom programming the eeprom can be programmed via ate by pulling reset_n low (which tri-states the hub?s eeprom interface and allows an external source to program the eeprom). 5.2.3 eeprom data note: extensions to the i 2 c specification are not supported. note: 10-bit addressing is not supported. table 5-1: user-defined descriptor data field byte msb: lsb size (bytes) default cfg self (hex) default cfg bus (hex) description vid 1:0 2 0424 0424 vendor id (assigned by usb-if). pid 3:2 2 4-port = 2504 4-port = 2504 product id (assigned by manufacturer). did 5:4 2 0000 0000 device id (assigned by manufacturer). config data byte 1 6 1 98 1c configuration data byte #1 for hub options. config data byte 2 7 1 90 90 configuration data byte #2 for hub options. non removable device 8 1 00 00 defines the ports that contain attached devices (this is used only when hub is part of a compound device). port disable self-powered 9 1 00 00 selects the ports that will be permanently disabled port disable bus-powered a 1 00 00 selects the ports that will be permanently disabled max power self-powered b 1 01 01 max current for this configuration (expressed in 2ma units). max power bus-powered c 1 64 64 max current for this configuration (expressed in 2ma units).
usb2504/usb2504a ds000002250a-page 16 ? 2007 - 2016 microchip technology inc. 5.2.3.1 eeprom offset 1:0(h) - vendor id 5.2.3.2 eeprom offset 3:2(h) - product id 5.2.3.3 eeprom offset 5:4(h) - device id 5.2.3.4 eeprom offset 6(h) - config_byte_1 hub controller max current self-powered d 1 01 01 max current (expressed in 2ma units). hub controller max current bus-powered e 1 64 64 max current (expressed in 2ma units). power-on time f 1 32 32 time until power is stable. bit number bit name description 15:8 vid_msb most significant byte of the vendor id. 7:0 vid_lsb least significant byte of the vendor id. bit number bit name description 15:8 pid_msb most significant byte of the product id. 7:0 pid_lsb least significant byte of the product id. bit number bit name description 15:8 did_msb most significant byte of the device id. 7:0 did_lsb least significant byte of the device id. bit number bit name description 7 self_bus_pwr self or bus power: selects between self- and bus-powered operation. 0 = bus-powered operation. (bus default) 1 = self-powered operation. (self default) note: if dynamic power switching is enabled, this bit is ignored and the self_pwr pin is used to determine if the hub is operating from self or bus power. 6 port_ind port indicator support: indicates implementation of led indicators 0 = no led indicators. 1 = led indicators. 5 hs_disable high speed disable: di sables the capability to at tach as either a high/full- speed device, and forces attachment as full-speed only i.e. (no high-speed support). 0 = high-/full-speed. (default) 1 = full-speed-only (high-speed disabled!) table 5-1: user-defined descriptor data (continued) field byte msb: lsb size (bytes) default cfg self (hex) default cfg bus (hex) description
? 2007 - 2016 microchip technology inc. ds000002250a-page 17 usb2504/usb2504a 5.2.3.5 eeprom offset 7(h) - config_byte_2 5.2.3.6 eeprom offset 8(h) - non-removable device 4 mtt_enable multi-tt enable: enables one tr ansaction translator per port operation. 0 = single tt for all ports. 1 = one tt per port (multiple tt?s supported) 3 eop_disable eop disable: disables eop generation at eof1 when no downstream directed traffic is in progress. 0 = eop generation at eof1 is enabled. 1 = eop generation at eof1 is disabled, (normal operation). (default) 2:1 current_sns over current sense: indicates wh ether current sensing is on a port-by-port basis, or ganged, or no overcurrent sensing. 00 = ganged sensing (all ports together). (default for self-power) 01 = individual port-by-port. 1x = over current sensing not support ed. (may be used with bus-powered configurations only!, and is the default for bus-power) 0 port_pwr port power switching: indicates whether port power switching is on a port-by- port basis or ganged. 0 = ganged switching (all ports together) 1 = individual port-by-port switching. bit number bit name description 7 dynamic dynamic power enable: controls the ability for the hub to transition to bus- powered operation if the local power source is removed (can revert back to self-power if local power source is restored). 0 = no dynamic auto-switching. 1 = dynamic auto-switching capable.(default) 6 reserved reserved 5:4 oc_timer overcurrent timer: over current timer delay. 00 = 0.1ms 01 = 2ms (default) 10 = 4ms 11 = 6ms 3 compound compound device: designates if hub is part of a compound device. 0 = no. (default) 1 = yes, hub is part of a compound device. 2:0 reserved reserved. bit number bit name description 7:0 nr_device non-removable device: indicate s which port(s) include non-removable devic- es. ?0? = port is removable, ?1? = port is non-removable. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 non-removable. bit 3= 1; port 3 non-removable. bit 2= 1; port 2 non-removable. bit 1= 1; port 1 non removable. bit 0 is reserved, always = ?0?. bit number bit name description
usb2504/usb2504a ds000002250a-page 18 ? 2007 - 2016 microchip technology inc. 5.2.3.7 eeprom offs et 9(h) - port disable fo r self powered operation 5.2.3.8 eeprom offset a( h) - port disable for bus powered operation 5.2.3.9 eeprom offset b( h) - max power for se lf powered operation 5.2.3.10 eeprom offs et c(h) - max power fo r bus powered operation bit number bit name description 7:0 port_dis_sp port disable self-powered: disables 1 or more contiguous ports. ?0? = port is available, ?1? = port is disabled. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 is disabled. bit 3= 1; port 3 is disabled. bit 2= 1; port 2 is disabled. bit 1= 1; port 1 is disabled. bit 0 is reserved, always = ?0? bit number bit name description 7:0 port_dis_bp port disable bus-po wered: disables 1 or more co ntiguous ports. ?0? = port is available, ?1? = port is disabled. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 is disabled. bit 3= 1; port 3 is disabled. bit 2= 1; port 2 is disabled. bit 1= 1; port 1 is disabled. bit 0 is reserved, always = ?0? bit number bit name description 7:0 max_pwr_sp max power self_powered: value in 2ma increments that the hub consumes from an upstream port (vbus) when operating as a self-powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. note: the usb 2.0 specification does not permit this value to exceed 100ma a value of 50 (decimal) indicates 100ma. bit number bit name description 7:0 max_pwr_bp max power bus_powered: value in 2ma increments that the hub consumes from an upstream port (vbus) when operating as a bus-powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. a value of 50 (decimal) indicates 100ma.
? 2007 - 2016 microchip technology inc. ds000002250a-page 19 usb2504/usb2504a 5.2.3.11 eeprom offset d(h) - hub controller max current for self powered operation 5.2.3.12 eeprom offs et e(h) - hub controller max cu rrent for bus po wered operation 5.2.3.13 eeprom of fset f(h) - power-on time 5.3 smbus slave interface instead of loading user-defined descriptor data from an external eeprom, the microchip hub can be configured to receive a code load from an external processor via an smbu s interface. the smbus interface shares the same pins as the eeprom interface, if cfg_sel1 & cfg_sel0 activates the smbus interface, external eeprom support is no longer available (and the user-defined descriptor data must be downloaded via the smbus). due to system issues, the microchip hub waits indefinitely for the smbus code load to complete and only ?appears? as a newly connected device on usb after the code load is complete. the hub?s smbus implementation is a subset of t he smbus interface to the host. the device is a slave-only smbus device. the implementation in the device is a subs et of smbus since it only supports two protocols. the write byte and read byte protocols are the only vali d smbus protocols for the hub. the hub responds to other protocols as described in section 5.3.2, "invalid protoc ol response behavior," on page 20 . reference the system man- agement bus specification, rev 1.0. the smbus interface is used to read and write the registers in the devi ce. the register set is shown in section 5.3.9, "internal smbus memory register set," on page 21 . 5.3.1 bus protocols typical write byte and read byte protocols are shown below. register accesses are performed using 7-bit slave addressing, an 8-bit register address field, and an 8-bit dat a field. the shading indicates the hub driving data on the smbdata line; otherwise, host data is on the sda/smbdata line. the slave address is the unique smbus interface address for t he hub that identifies it on smbus. the register address field is the internal address of the regist er to be accessed. the register data fiel d is the data that the host is attempting to write to the register or the contents of the register that the host is attempting to read. bit number bit name description 7:0 hc_max_c_sp hub controller max current self -powered: value in 2ma increments that the hub consumes from an upstream po rt (vbus) when operating as a self- powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all as sociated circuitry on the board. this value does not include the power cons umption of a permanently attached peripheral if the hub is c onfigured as a compound device. note: the usb 2.0 specification does not permit this value to exceed 100ma a value of 50 (decimal) indicates 100ma, which is the default value. bit number bit name description 7:0 hc_max_c_bp hub controller max current bus- powered: value in 2ma increments that the hub consumes from an upstream po rt (vbus) when operating as a self- powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all as sociated circuitry on the board. this value does not include the power cons umption of a permanently attached peripheral if the hub is c onfigured as a compound device. a value of 50 (decimal) indicates 100ma, which is the default value. bit number bit name description 7:0 power_on_time power on time: the length of time that is takes (in 2 ms intervals) from the time the host initiated power-on sequenc e begins on a port until power is good on that port.
usb2504/usb2504a ds000002250a-page 20 ? 2007 - 2016 microchip technology inc. 5.3.1.1 byte protocols when using the hub smbus interface for byte transfers, a write will always consist of the smbus interface slave address byte, followed by the internal ad dress register byte, then the data byte. the normal read protocol consists of a write to the hub with the smbus interface address byte, followed by the internal address register byte. then restart the serial communicat ion with a read consisting of the smbus interface address byte, followed by the data byte read from the hub. th is can be accomplished by us ing the read byte protocol. write byte the write byte protocol is used to wr ite data to the registers. the data will on ly be written if the protocol shown in table 5-2 is performed correctly. only one byte is transferred at a time for a write byte protocol. read byte the read byte protocol is used to read data from the registers. the data will only be read if the protocol shown in table 5-3 is performed correctly. only one byte is tran sferred at a time for a read byte protocol. 5.3.2 invalid protocol response behavior registers that are accessed with an invalid protocol are not u pdated. a register is only updated following a valid protocol. the only valid protocols are write byte and read byte, which are described above. the hub only responds to the hardware selected slave address. attempting to communicate with the hub over smbus with an invalid slave address or invalid protocol results in no response, and the smbus slave interface returns to the idle state. the only valid registers that are accessi ble by the smbus slave address are the registers defined in the registers sec- tion. see section 5.3.3 for the response to undefined registers. 5.3.3 general call address response the hub does not respond to a general call address of 0000_000b. 5.3.4 slave device time-out according to the smbus specification, v1.0 devices in a transfer can abort the transfer in progress and release the bus when any single clock low interval exceeds 25ms (t timeout, min ). devices that have detect ed this condition must reset their communication and be able to receive a new start condition no later than 35ms (t timeout, max ). note: data bytes are transferred msb first (msb first). note: for the following smbus tables: table 5-2: smbus write byte protocol field: start slave addr wr ack reg. addr ack reg. data ack stop bits:1 71181811 table 5-3: smbus read byte protocol field: start slave addr wr ack reg. addr ack start slave addr rd ack reg. data nack stop bits: 1 7 1 1 8 1 1 7 1 1 8 1 1 denotes master-to-slave denotes slave-to-master
? 2007 - 2016 microchip technology inc. ds000002250a-page 21 usb2504/usb2504a 5.3.5 stretching the sclk signal the hub supports stretching of the sclk by other de vices on the smbus. the hub does not stretch the sclk. 5.3.6 smbus timing the smbus slave interface complies with the smbus ac timi ng specification. see the smbus timing in the ?timing diagram? section. 5.3.7 bus reset sequence the smbus slave interface resets and returns to the idle state upon a start field followed immediately by a stop field. 5.3.8 smbus alert response address the smbalert# signal is not supported by the hub. 5.3.9 internal smbus me mory register set the following table provides the smbus slave interface register map values. note: some simple devices do not contain a clock low drive circ uit; this simple kind of de vice typically resets its communications port after a start or stop condition. table 5-4: smbus slave interface register map reg addr r/w register name abbr bit 7 (msb) bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 (lsb) 00h r/w status/command stcd 7 6 5 4 3 2 1 0 01h r/w vid lsb vidl 7 6 5 4 3 2 1 0 02h r/w vid msb vidm 7 6 5 4 3 2 1 0 03h r/w pid lsb pidl 7 6 5 4 3 2 1 0 04h r/w pid msb pidm 7 6 5 4 3 2 1 0 05h r/w did lsb didl 7 6 5 4 3 2 1 0 06h r/w did msb didm 7 6 5 4 3 2 1 0 07h r/w config data byte 1 cfg1 7 6 5 4 3 2 1 0 08h r/w config data byte 2 cfg2 7 6 5 4 3 2 1 0 09h r/w non-removable devices nrd 7 6 5 4 3 2 1 0 0ah r/w port disable (self) pds 7 6 5 4 3 2 1 0 0bh r/w port disable (bus) pdb 7 6 5 4 3 2 1 0 0ch r/w max power (self) maxps 7 6 5 4 3 2 1 0 0dh r/w max power (bus) maxpb 7 6 5 4 3 2 1 0 0eh r/w hub controller max current (self) hcmcs 7 6 5 4 3 2 1 0 0fh r/w hub controller max current (bus) hcmcb 7 6 5 4 3 2 1 0 10h r/w power-on time pwrt 7 6 5 4 3 2 1 0
usb2504/usb2504a ds000002250a-page 22 ? 2007 - 2016 microchip technology inc. 5.3.9.1 register 00h: status/command (reset = 0x00) 5.3.9.2 register 01h: vendor id (lsb) (reset = 0x00) 5.3.9.3 register 02h: vendor id (msb) (reset = 0x00) 5.3.9.4 register 03h: product id (lsb) (reset = 0x00) 5.3.9.5 register 04h: product id (msb) (reset = 0x00) 5.3.9.6 register 05h: device id (lsb) (reset = 0x00) bit number bit name description 7:3 reserved reserved. {note: software must never write a ?1? to these bits} 2 reset reset the smbus interf ace and internal memory back to reset_n assertion default settings. {note: during this reset, this bit is automatically cleared to its default value of 0.} 0 = normal run/idle state. 1 = force a reset. 1 write_prot write protect: the external smbus host sets this bit after the hub?s internal memory is loaded with configuration data. {note: the external smbus host is responsible for verification of downloaded data.} 0 = the internal memory (address ra nge 01-10h) is not write protected. 1 = the internal memory (address range 01-10h) is ?write-protected? to prevent unintentional data corruption.} note: {this bit is write once and is only cleared by assertion of the external reset_n pin.} 0 usb_attach usb attach & powe r-down the smbus interface. 0 = default; smbus slave interface is active. 1 = hub will signal a usb attach event to an upstream device, note: smbus slave interface will completely power down after the ack has completed. note: {this bit is write once and is only cleared by assertion of the external reset_n pin.} bit number bit name description 7:0 vid_lsb least significant byte of the vendor id. bit number bit name description 7:0 vid_msb most significant byte of the vendor id. bit number bit name description 7:0 pid_lsb least significant byte of the product id. bit number bit name description 7:0 pid_msb most significant byte of the product id. bit number bit name description 7:0 did_lsb least significant byte of the device id.
? 2007 - 2016 microchip technology inc. ds000002250a-page 23 usb2504/usb2504a 5.3.9.7 register 06h: device id (msb) (reset = 0x00) 5.3.9.8 register 07h: config_byte_1 (reset = 0x00) 5.3.9.9 register 08h: configuration data byte 2 (reset = 0x00) bit number bit name description 7:0 did_msb most significant byte of the device id. bit number bit name description 7 self_bus_pwr self or bus power: selects between self- and bus-powered operation. 0 = bus-powered operation. 1 = self-powered operation. note: if dynamic power switching is enabled, this bit is ignored and the self_pwr pin is used to determine if the hub is operating from self or bus power. 6 port_ind port indicator support: indicates implementation of led indicators 0 = no led indicators. 1 = led indicators. 5 hs_disable high speed disable: di sables the capability to at tach as either a high/full- speed device, and forces attachment as full-speed only i.e. (no high-speed support). 0 = high-/full-speed. 1 = full-speed-only (high-speed disabled!) 4 mtt_enable multi-tt enable: enables one tr ansaction translator per port operation. 0 = single tt for all ports. 1 = one tt per port (multiple tt?s supported) 3 eop_disable eop disable: disables eop genera tion of eof1 when in full-speed mode. 0 = eop generation is normal. 1 = eop generation is disabled. 2:1 current_sns over current sense: indicates wh ether current sensing is on a port-by-port basis, or ganged, or no overcurrent sensing. 00 = ganged sensing (all ports together). 01 = individual port-by-port. 1x = over current sensing not suppo rted. (must only be used with bus- powered configurations!) 0 port_pwr port power switching: indicates whether port power switching is on a port-by- port basis or ganged. 0 = ganged switching (all ports together) 1 = individual port-by-port switching. bit number bit name description 7 dynamic dynamic power enable: controls the ability for the hub to transition to bus- powered operation if the local power source is removed (can revert back to self-power if local power source is restored). 0 = no dynamic auto-switching. 1 = dynamic auto-switching capable. 6 reserved reserved
usb2504/usb2504a ds000002250a-page 24 ? 2007 - 2016 microchip technology inc. 5.3.9.10 register 09h: non-removable device (reset = 0x00) 5.3.9.11 register 0ah: port disable for self powered operation (reset = 0x00) 5.3.9.12 register 0bh: port disable for bus powered operation (reset = 0x00) 5:4 oc_timer overcurrent timer: over current timer delay. 00 = 0.1ms 01 = 2ms 10 = 4ms 11 = 6ms 3 compound compound device: designates if hub is part of a compound device. 0 = no. 1 = yes, hub is part of a compound device. 2:0 reserved reserved bit number bit name description 7:0 nr_device non-removable device: indicate s which port(s) include non-removable devic- es. ?0? = port is removable, ?1? = port is non-removable. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 non-removable. bit 3= 1; port 3 non-removable. bit 2= 1; port 2 non-removable. bit 1= 1; port 1 non removable. bit 0 is reserved, always = ?0?. bit number bit name description 7:0 port_dis_sp port disable self-powered: disables 1 or more contiguous ports. ?0? = port is available, ?1? = port is disabled. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 is disabled. bit 3= 1; port 3 is disabled. bit 2= 1; port 2 is disabled. bit 1= 1; port 1 is disabled. bit 0 is reserved, always = ?0? bit number bit name description 7:0 port_dis_bp port disable bus-po wered: disables 1 or more co ntiguous ports. ?0? = port is available, ?1? = port is disabled. bit 7= reserved bit 6= reserved bit 5= reserved bit 4= 1; port 4 is disabled. bit 3= 1; port 3 is disabled. bit 2= 1; port 2 is disabled. bit 1= 1; port 1 is disabled. bit 0 is reserved, always = ?0? bit number bit name description
? 2007 - 2016 microchip technology inc. ds000002250a-page 25 usb2504/usb2504a 5.3.9.13 register 0ch: max power for se lf powered operation (reset = 0x00) 5.3.9.14 register 0dh: max power for bus powered operation (reset = 0x00) 5.3.9.15 register 0eh: hub controller max curr ent for self powered operation (reset = 0x00) 5.3.9.16 register 0fh: hub controller max current for bus powered operation (reset = 0x00) 5.3.9.17 register 10h: power-on time (reset = 0x00) bit number bit name description 7:0 max_pwr_sp max power self_powered: value in 2ma increments that the hub consumes from an upstream port (vbus) when operating as a self-powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. note: the usb 2.0 specification does not permit this value to exceed 100ma a value of 50 (decimal) indicates 100ma. bit number bit name description 7:0 max_pwr_bp max power bus_powered: value in 2ma increments that the hub consumes from an upstream port (vbus) when operating as a bus-powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all associated circuitry on the board. this value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0ma in its descriptors. a value of 50 (decimal) indicates 100ma. bit number bit name description 7:0 hc_max_c_sp hub controller max current self -powered: value in 2ma increments that the hub consumes from an upstream po rt (vbus) when operating as a self- powered hub. this value includes the hub silicon along with the combined power consumption (from vbus) of all as sociated circuitry on the board. this value does not include the power cons umption of a permanently attached peripheral if the hub is c onfigured as a compound device. note: the usb 2.0 specification does not permit this value to exceed 100ma a value of 50 (decimal) indicates 100ma, which is the default value. bit number bit name description 7:0 hc_max_c_bp hub controller max current bus- powered: value in 2ma increments that the hub consumes from an upstream po rt (vbus) when operating as a bus- powered hub. this value will include the hub silicon along with the combined power consumption (from vbus) of all as sociated circuitry on the board. this value will not include the power co nsumption of a permanently attached peripheral if the hub is c onfigured as a compound device. a value of 50 (decimal) would indica te 100ma, which is the default value. bit number bit name description 7:0 power_on_time power on time: the length of time that it takes (in 2 ms intervals) from the time the host initiated power-on sequenc e begins on a port until power is good on that port.
usb2504/usb2504a ds000002250a-page 26 ? 2007 - 2016 microchip technology inc. 5.3.9.18 undefined registers the registers shown in ta b l e 5 - 4 are the defined registers in the hub. read s to undefined registers return 00h. writes to undefined registers have no effect and do not return an error. 5.3.9.19 reserved registers unless otherwise instructed, only a ?0? may be written to all reserved registers or bits. 5.4 default configuration option: the microchip hub can be configured via its internal default co nfiguration. (please see for specific details on how to enable default configuration. please refer to table 5-1 on page 15 for the internal default values that are loaded when this option is selected. 5.5 default strapping options: the microchip hub can be configured via a combination of internal default values and pin strap options. please see table 4-1, "4-port hub pin descriptions" for specific details on how to enable t he default/pin-strap co nfiguration option. the strapping option pins only cover a lim ited sub-set of the configuration options. the internal default values will be used for the bits & registers that are not controlled by a strapping option pin. please refer to table 5-1 on page 15 for the internal default values that are loaded when this option is selected. the amber and green led pins are sampled after reset_n negation, and th e logic values are us ed to configure the hub if the internal default conf iguration mode is selected. th e implementation shown below (see figure 5-1 ) shows a recommended passive scheme. when a pin is configured wit h a ?strap high? configurat ion, the led functions with active low signaling, and the pad will ?sin k? the current from the external supply . when a pin is configured with a ?strap low? configuration, the led functions with active high sign aling, and the pad will ?source? the current to the external led. figure 5-1: led strapping option hub 50k strap low gr2 50k strap high gr1 +v
? 2007 - 2016 microchip technology inc. ds000002250a-page 27 usb2504/usb2504a 5.6 reset there are two different resets that the hub experiences. one is a hardware reset (via the reset_n pin) and the second is a usb bus reset. 5.6.1 external hardware reset_n a valid hardware reset is defined as, assertion of reset_n for a minimum of 1us after all power supplies are within operating range. while reset is asserted, the hub (and it s associated external circuitry) consumes less than 500 ? a of current from the upstream usb power source (300 ? a for the hub and 200 ? a for the external circuitry). assertion of reset_n (external pin) causes the following: 1. all downstream ports are disabled, and prtpwr power to downstream devices is removed. 2. the phys are disabled, and the differential pairs will be in a high-impedance state. 3. all transactions immediately te rminate; no states are saved. 4. all internal registers return to the default state (in most cases, 00(h)). 5. the external crystal oscillator is halted. 6. the pll is halted. 7. led indicators are disabled. the hub is ?operational? 500 ? s after reset_n is negated. once operational, the hub immediately reads oem-specific dat a from the external eeprom (if the smbus option is not disabled). 5.6.1.1 reset_n for strappin g option configuration figure 5-2: reset_n timing fo r default/strap option mode table 5-5: reset_n timing fo r default/strap option mode name description min typ max units t1 reset_n asserted. 1 ? sec t2 strap setup time 16.7 nsec t3 strap hold time. 16.7 1400 nsec t4 hub outputs driven to inactive logic states 2.0 1.5 ? sec t1 t4 t5 t6 t7 t8 valid don?t care don?t care driven by hub if strap is an output. reset_n vss strap pins vss hardware reset asserted read strap options drive strap outputs to inactive levels attach usb upstream usb reset recovery idle start completion request response t2 t3
usb2504/usb2504a ds000002250a-page 28 ? 2007 - 2016 microchip technology inc. note 1: when in bus-powered mode, the hub and its associated circuitry must not consume more than 100ma from the upstream usb power source during t1+t5. 2: all power supplies must have reach ed the operating levels mandated in section 8.0, "dc parameters" , prior to (or coincident with) the assertion of reset_n. 5.6.1.2 reset_n for eepr om configuration note 1: when in bus-powered mode, the hub and its associated circuitry must not consume more than 100ma from the upstream usb power s ource during t4+t5+t6+t7. 2: all power supplies must have reach ed the operating levels mandated in section 8.0, "dc parameters" , prior to (or coincident with) the assertion of reset_n. t5 usb attach (see note). 100 msec t6 host acknowledges attach and signals usb reset. 100 msec t7 usb idle. undefined msec t8 completion time for requests (with or without data stage). 5 msec figure 5-3: reset_n timing for eeprom mode table 5-6: reset_n timing for eeprom mode name description min typ max units t1 reset_n asserted. 1 ? sec t2 hub recovery/stabilization. 500 ? sec t3 eeprom read / hub config. 2.0 99.5 msec t4 usb attach (see note). 100 msec t5 host acknowledges attach and signals usb reset. 100 msec t6 usb idle. undefined msec t7 completion time for requests (with or without data stage). 5 msec table 5-5: reset_n timing for defau lt/strap option mode (continued) name description min typ max units t1 t2 t4 t5 t6 t7 reset_n vss hardware reset asserted read strap options read eeprom + set options attach usb upstream usb reset recovery idle start completion request response t3
? 2007 - 2016 microchip technology inc. ds000002250a-page 29 usb2504/usb2504a 5.6.1.3 reset_n for smbus sl ave configuration note 1: for bus-powered configurations, the 99.5ms (max) is required, and the hub and its associated circuitry must not consume more than 100ma from the upstream usb power sour ce during t2+t3+t4+t5+t6+t7. for self-powered configurations, t3 max is not applicable and the time to load the configuration is determined by the external smbus host. 2: all power supplies must have reach ed the operating levels mandated in section 8.0, "d c parameters" , prior to (or coincident with) the assertion of reset_n. 5.6.2 usb bus reset in response to the upstream port signaling a reset to the hub, the hub does the following: 1. sets default address to 0. 2. sets configuration to: unconfigured. 3. negates prtpwr[4:1] to all downstream ports. 4. clears all tt buffers. 5. moves device from suspended to active (if suspended). 6. complies with section 11.10 of the usb 2.0 specificat ion for behavior after completion of the reset sequence. the host then configures the hub and the hub?s downstream port devices in accordance with the usb specification. figure 5-4: reset_n ti ming for smbus mode table 5-7: reset_n timing for smbus mode name description min typ max units t1 reset_n asserted. 1 ? sec t2 hub recovery/stabilization. 500 ? sec t3 smbus code load (see note). 10 99.5 msec t4 hub configuration and usb attach. 100 msec t5 host acknowledges attach and signals usb reset. 100 msec t6 usb idle. undefined msec t7 completion time for requests (with or without data stage). 5 msec note: the hub does not propagate the upstream usb reset to downstream devices. t1 t2 t4 t5 t6 t7 reset_n vss hardware reset asserted reset negation smbus code load attach usb upstream usb reset recovery idle start completion request response t3 hub phy stabilization
usb2504/usb2504a ds000002250a-page 30 ? 2007 - 2016 microchip technology inc. 6.0 backward compatibil ity to the usb20h04 the usb2504/usb2504a is pin compatible to the usb20h04, bu t is not designed to be a direct drop-in replacement. many existing usb20h04 designs ma y accommodate a usb2504/usb2504a in place of the usb20h04, as long as specific bill-of-material (bom) modifications and popul ation option changes are im plemented. since each design is unique, every customer considering a change from a usb20h 04 to a usb2504/usb2504a should contact microchip applications engineering for assistance. 6.1 internal 1.8v regulator the usb2504/usb2504a has two internal 1.8v regulators t hat are enabled by default (atest pin contains an internal pull-up, and was specified as a no-connect in the usb20h04 data sheet). each regulator requires a separate 4.7uf low esr capacitor to ground. the usb20h04 designs that dire ctly connect the digital and analog 1.8v pins together will not support a usb2504/usb2504a (unless the internal regulators are disabled). 6.2 configuration by internal defaults the internal default settings that are loaded when this option is selected ar e very similar (but not identical) to those that were loaded in the usb20h04. the cfg_sel[2:0] pins will properly select this method if the existing usb20h04 design was set-up to load the configuration via internal defaults. the usb2504/usb2504a has pin strapping op tions that enable modification of the internal default load without requir- ing an eeprom. the cfg_sel2 pin (pin 59) on the usb2504/usb2504a was a vss pin on the usb20h04 so this functionality will be disabled when a usb2504/usb2504a is placed into a usb20h04 design. 6.3 configuration by smbus the cfg_sel[2:0] pins will properly select this method if the existing usb20h04 de sign was set-up to load the config- uration via smbus. the usb2504/usb2504a has a few additi onal registers, and has also moved some of the configu- ration bits so the actual smbus code load itself will need to be modified. if a usb20h04 smbus load is programmed into a usb2504/usb2504a, the results are unpredictable. 6.4 prtpwr_pol the usb2504/usb2504a has a new strapping op tion that enables the port power contro l active state to be either active- high or active-low. the usb20h04 only provided active-l ow port power control. the prtpwr_pol pin on the usb2504/usb2504a is pin 23, which was a vss pin on the u sb20h04, so by default, a usb20h04 design will select active-low port port control.
? 2007 - 2016 microchip technology inc. ds000002250a-page 31 usb2504/usb2504a 7.0 xnor test xnor continuity tests all signal pins on the hub (every pin except for nc, xtal1/cl kin, xtal2, atest/reg_en, rbias, test1, power, and ground). this functionality is enabled by driving test1 and cfg_sel[1] high, driving sclk low and transition reset_n from low to high. the output from the xn or chain is driven to gr2. for each pin tested for continuity gr2 should toggle.
usb2504/usb2504a ds000002250a-page 32 ? 2007 - 2016 microchip technology inc. 8.0 dc parameters 8.1 maximum ratings 8.2 recommended operating conditions parameter symbol min max units comments storage temperature t a -55 150 c lead temperature 325 c soldering < 10 seconds 1.8v supply voltage v dda18pll v dd18 -0.5 2.5 v 3.3v supply voltage v dda33 v dda33pll v dd33 -0.5 4.0 v voltage on any i/o pin -0.5 (3.3v supply voltage + 2) ?? 6v voltage on xtal1 -0.5 4.0 v voltage on xtal2 -0.5 v dd18 + 0.3v v note: stresses above the specified parameters could cause permanent damage to the device. this is a stress rating only and functional operation of the device at any condition above those in dicated in the operation sections of this specification is not implied. wh en powering this device from laboratory or system power supplies, it is important that the absolute maximum ratings not be exceeded or device failure can result. some power supplies exhibit voltage spikes on their outputs when the ac power is switched on or off. in addition, voltage transients on the ac power line may a ppear on the dc output. when this possibility exists, it is suggested that a clamp circuit be used. parameter symbol min max units comments operating temperature t a 070c 1.8v supply voltage v dda18pll v dd18 1.71 1.98 v 3.3v supply voltage v dda33 v dda33pll v dd33 3.0 3.6 v voltage on any i/o pin -0.3 5.5 v if any 3.3v supply voltage drops below 3.0v, then the max becomes: (3.3v supply voltage + 0.5) voltage on xtal1 -0.3 v dda33 v voltage on xtal2 -0.3 v dd18 v
? 2007 - 2016 microchip technology inc. ds000002250a-page 33 usb2504/usb2504a table 8-1: dc electrical characteristics parameter symbol min typ max units comments i, is type input buffer low input level high input level input leakage hysteresis (?is? only) v ili v ihi i il v hysi 2.0 -10 250 300 0.8 +10 350 v v ua mv ttl levels v in = 0 to v dd33 input buffer with pull-up (ipu) low input level high input level low input leakage high input leakage v ili v ihi i ill i ihl 2.0 +26 -10 0.8 +72 +10 v v ua ua ttl levels v in = 0 v in = v dd33 input buffer with pull-down ipd low input level high input level low input leakage high input leakage v ili v ihi i ill i ihl 2.0 +10 -22 0.8 -10 -82 v v ua ua ttl levels v in = 0 v in = v dd33 iclk input buffer low input level high input level input leakage hysteresis v ilck v ihck i il v hysc 2.0 -10 50 0.8 +10 100 v v ua mv ttl levels v in = 0 to v dd33 o12 and i/o12 type buffer low output level high output level output leakage v ol v oh i ol 2.4 0.4 +10 v v ua i ol = 12ma @ v dd33 = 3.3v i oh = -4ma @ v dd33 = 3.3v v in = 0 to v dd33 (note 1) od12 type buffer low output level output leakage v ol i ol -10 0.4 +10 v a i ol = 12ma @ v dd33 = 3.3v v in = 0 to v dd33 (note 1)
usb2504/usb2504a ds000002250a-page 34 ? 2007 - 2016 microchip technology inc. note 1: output leakage is measured with th e current pins in high impedance. 2: see usb 2.0 specification for u sb dc electrical characteristics. 3: rbias is a 3.3v tolerant analog pin. i/osd12 type buffer low output level output leakage hysteresis v ol i ol v hysi -10 250 300 0.4 +10 350 v a mv i ol = 12 ma @ v dd33 = 3.3v v in = 0 to v dd33 (note 1) io-u (note 2) i-r (note 3) supply current unconfigured high-speed host full-speed host i ccinit i ccinit 100 95 ma ma supply current configured (high-speed host) 2 ports @ fs/ls 2 ports @ hs 1 port hs, 1 port fs/ls 3 ports @ hs 4 ports @ hs i hcc2 i hch2 i hch1c1 i hch3 i hcc4 190 235 215 265 295 ma ma ma ma ma total from all supplies supply current configured (full-speed host) 1 port 2 ports 3 ports 4 ports i fcc1 i fcc2 i fcc3 i fcc4 150 155 160 165 ma ma ma ma total from all supplies supply current suspend i csby 265 ua total from all supplies. supply current reset i rst 150 ua total from all supplies. table 8-1: dc electrical characteristics (continued) parameter symbol min typ max units comments
? 2007 - 2016 microchip technology inc. ds000002250a-page 35 usb2504/usb2504a capacitance t a = 25c; fc = 1mhz; v dd33 = 3.3 v power sequencing there are no power supply sequence restrictions for the hub. the order in which power supplies power-up and power- down is implementation dependent. limits parameter symbol min typ max unit test condition clock input capacitance c in 12 pf all pins except usb pins (and pins under test tied to ac ground) input capacitance c in 8pf output capacitance c out 12 pf
usb2504/usb2504a ds000002250a-page 36 ? 2007 - 2016 microchip technology inc. 9.0 ac specifications 9.1 oscillator/clock crystal: parallel resonant, fundamental mode, 24 mhz ? 100ppm. external clock: 50% duty cycle ? 10%, 24 mhz ? 100ppm, jitter < 100 ps rms. 9.1.1 smbus interface: the microchip hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the smbus 1.0 specification for slave-only devices (except as noted in section 5.3 ). 9.1.2 i 2 c eeprom: frequency is fixed at 59khz ?????? 9.1.3 usb 2.0 the hub conforms to all voltage, power, and timing characteri stics and specifications as set forth in the usb 2.0 spec- ification. please refer to the usb specification for more information.
? 2007 - 2016 microchip technology inc. ds000002250a-page 37 usb2504/usb2504a 10.0 package outline figure 10-1: 64-pin lqfp package outline (10x10x1.4mm body - 2mm footprint)
usb2504/usb2504a ds000002250a-page 38 ? 2007 - 2016 microchip technology inc. appendix a: data sheet revision history table a-1: revision history revision section/figure/entry correction ds000002250a (07-29-16) replaces previous smsc version rev. 2.3 (08-27-07).
? 2007 - 2016 microchip technology inc. ds000002250a-page 39 usb2504/usb2504a the microchip web site microchip provides online support via our www site at www.microchip.com . this web site is used as a means to make files and information easily available to customers. accessible by using your favorite internet browser, the web site con- tains the following information: ? product support ? data sheets and errata, application notes and sample programs, design resources, user?s guides and hardware support documents, latest software releases and archived software ? general technical support ? frequently asked questions (faq), te chnical support requests, online discussion groups, microchip consultant program member listing ? business of microchip ? product selector and ordering guides, latest microchip press releases, listing of semi- nars and events, listings of microchip sales offi ces, distributors and factory representatives customer change notification service microchip?s customer notification servic e helps keep customers current on microc hip products. subscribers will receive e-mail notification whenever there are changes, updates, revisi ons or errata related to a specified product family or development tool of interest. to register, access the microchip web site at www.microchip.com . under ?support?, click on ?customer change notifi- cation? and follow the registration instructions. customer support users of microchip products can receive assistance through several channels: ? distributor or representative ? local sales office ? field application engineer (fae) ? technical support customers should contact their distributor, representative or field application engineer (fae) for support. local sales offices are also available to help customers. a listing of sales offices and locations is included in the back of this docu- ment. technical support is available through the web site at: http://www.microchip.com/support
usb2504/usb2504a ds000002250a-page 40 ? 2007 - 2016 microchip technology inc. product identification system to order or obtain information, e.g., on pricing or de livery, refer to the factory or the listed sales office . part no. xxx package device device: usb2504/usb2504a package: jt = 64-pin lqfp examples: a) usb2504-jt = 64-pin lqfp rohs compliant package, tray b) USB2504A-JT = 64-pin lqfp rohs compliant package, tray -
? 2007 - 2016 microchip technology inc. ds000002250a-page 41 usb2504/usb2504a information contained in this publication re garding device applications and the like is provided only for your convenience and may be super- seded by updates. it is your responsibility to ensure that your application meets with your s pecifications. microchip makes no rep- resentations or warranties of any kind whether ex press or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fi tness for purpose . microchip disclaims all liability arising from this information and its use. use of micro- chip devices in life support and/or safety applications is entire ly at the buyer?s risk, and the buyer agrees to defend, indemn ify and hold harmless microchip from any and all damages, cl aims, suits, or expenses resulting from such use. no licens es are conveyed, impl icitly or otherwise, under any microchip intellectual property rights unless otherwise stated. trademarks the microchip name and logo, the microchip logo, anyrate, dspic, flashflex, flexpwr, heldo, jukeblox, keeloq, keeloq logo, klee r, lancheck, link md, medialb, most, most logo, mplab, optolyze r, pic, picstart, pic32 logo, righttouch, spynic, sst, sst logo, superflash and uni/o are registered tradem arks of microchip technology incorporat ed in the u.s.a. and other countries. clockworks, the embedded control solutions company, ethersynch, hyper speed control, hyperlight load, intellimos, mtouch, precision edge, and quiet-wire are registered trademarks of microchip technology incorporated in the u.s.a. analog-for-the-digital age, any capacitor, anyin, anyout, body com, chipkit, chipkit logo, codeguard, dspicdem, dspicdem.net, dynamic average matching, dam, ecan, ethergreen, in-circuit se rial programming, icsp, inter-c hip connectivity, jitterblocker, kleernet, kleernet logo, miwi, motorbench, mpasm, mpf, mplab certified logo, mplib, mplink, multitrak, netdetach, omniscient code generation, picdem, picdem. net, pickit, pictail, puresilicon, righttouc h logo, real ice, ripple blocker, serial quad i/o, sqi, superswitcher, superswitcher ii, total endurance, tsharc, usbcheck, vari sense, viewspan, wiperlock, wireless dna, and zena are trademarks of mi crochip technology incorporated in the u.s.a. and other countries. sqtp is a service mark of microchi p technology incorporated in the u.s.a. silicon storage technology is a regi stered trademark of microchip tech nology inc. in other countries. gestic is a registered trademarks of micr ochip technology germany ii gmbh & co. kg, a subsidiary of microc hip technology inc., in other countries. all other trademarks mentioned herein are property of their respective companies. ? 2007 - 2016, microchip technology incorporated, printed in the u.s.a., all rights reserved. isbn: 9781522408086 note the following details of the code protection feature on microchip devices: ? microchip products meet the specification cont ained in their particular microchip data sheet. ? microchip believes that its family of products is one of the mo st secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal meth ods used to breach the code protection fe ature. all of these methods, to our knowledge, require using the microchip pr oducts in a manner outside the operating specif ications contained in microchip?s data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are committed to continuously improving the code protection features of our products. attempts to break microchip?s c ode protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your softwa re or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona; gresham, oregon and design centers in california and india. the company?s quality system processes and procedures are for its pic ? mcus and dspic ? dscs, k ee l oq ? code hopping devices, serial eeproms, microper ipherals, nonvolatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified. quality management s ystem by dnv == iso/ts 16949 ==
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